I fully agree. However, Mitch Zeller (the FDA's tobacco control guy) has been quoted as saying that if it doesn't contain nicotine derived from the tobacco plant, then the FDA has no jurisdiction to regulate it. However, if you read the deeming regulation, it seems to me that they do intend to regulate some things that don't contain tobacco, such as clearomizers, because they're excluding such things as cigarette lighters and ashtrays.
Here's the complete FSPTCA definition of tobacco product:
The term ‘tobacco product’ means any product made or derived from tobacco that is intended for human consumption, including any component, part, or accessory of a tobacco product (except for raw materials other than tobacco used in manufacturing a component, part, or accessory of a tobacco product).
This violates one of the basic rules of writing definitions, which is that you should not use the defined term in the definition. If a "tobacco product" has to be "made or derived from tobacco," then what is included in "component, part, or accessory of a tobacco product"? Is a pipe or cigarette holder a tobacco product accessory? Cigar wrappers? Apparently the FDA doesn't think so, but why not? What about a cigar cutter? They've already made it clear that they consider the paper used in roll-your-own cigs to be a tobacco product. They may argue that a refillable tank is conceptually the same as RYO paper. (I'd disagree because one burns and is inhaled, whereas the other one doesn't/isn't.) I'd argue that clearos and drip tips are more like pipes, and that if anything that holds or comes in contact with e-juice or vapor is included in "tobacco product," it leads to absurd results, such as drip tips being subject to an onerous and prohibitively costly approval process.
I think valid legal arguments can be made that the statutory definition of "tobacco product" is fatally ambiguous, overly broad and void for vagueness. Regulations leading to absurd results such as those mentioned above should be deemed arbitrary and capricious, unreasonable, and serving no legitimate governmental purpose. It will be interesting to see whether those arguments and others are presented and what the outcome will be.